Red Hat RH033 Online Practice Questions and Exam Preparation

Red Hat RH033 Online Questions & Answers

• Question 21:

  Which of the following commands can you use to assign a line number to every line of the install.log file? Each correct answer represents a complete solution. Choose all that apply.

  A. sed = install.log
  B. nl install.log
  C. wc -c install.log
  D. wc -m install.log
  A. sed = install.log
  B. nl install.log

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  Explanation/Reference:

  The nl install.log and sed = install.log commands can be used to assign a line number to every line of the install.log file.

  Answer options C and D are incorrect. The wc -c install.log and wc -m install.log commands will print the number of bytes and the number of characters, respectively.

• Question 22:

  Which of the following commands pipes stdout and stderr from cmd1 to cmd2?

  A. cmd2 | cmd1
  B. cmd2 2>and1 | cmd1
  C. cmd1 | cmd2
  D. cmd1 2>and1 | cmd2
  D. cmd1 2>and1 | cmd2

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  Explanation/Reference:

  The cmd1 2>and1 | cmd2 command pipes stdout and stderr from cmd1 to cmd2. Answer option C is incorrect. The cmd1 | cmd2 command pipes stdout from cmd1 to cmd2. Answer option B is incorrect. The cmd2 2>and1 | cmd1 command pipes

  the stdout and stderr from cmd2 to cmd1.

  Answer option A is incorrect. The cmd2 | cmd1 command pipes stdout from cmd2 to cmd1.

• Question 23:

  You work as a Network Administrator for company.com Inc. The company has Linux-based network.

  You want to search for files anywhere on the system that end in .txt. Which of the following commands will you use to accomplish the task?

  A. find /etc -name *.txt
  B. find /etc -name *.txt*
  C. find /etc -name *txt
  D. find /etc name *.txt
  A. find /etc -name *.txt

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  Explanation/Reference:

  find /etc -name *.txt command is used to search for files anywhere on the system that end in .txt.

  What is the find command?

  The find command can perform a search based on a variety of search limitations. It searches through one or more directory tree(s) of a filesystem, locating files based on some user-specified criteria. By default, find returns all files in the

  current working directory. Further, find allows a user to specify an action to be taken on each matched file. Thus, it is an extremely powerful command for applying actions to many files. The find command can be used with a wild card (*), but it

  works best when we know the name of the file or directory we are looking for.

  The find command can search your system for files that comply with certain numeric criteria, such as the size of the file (- size), the number of links to the file (-links), the date of the last change to the files data (-mtime), or the date of the last

  time the file was read (- atime). All these criteria accept a numeric value. When a numeric value is provided to find, it looks for an exact match, more than the number, or less than the number. Answer options D, B, and C are incorrect. There is

  no such commands in the Linux.

• Question 24:

  Which of the following key-combinations are used to view a file in two windows in a single vim screen? Each correct answer represents a complete solution. Choose two.

  A. Ctrl-w, v
  B. Ctrl-w, s
  C. :wq
  D. :q!
  A. Ctrl-w, v
  B. Ctrl-w, s

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  Explanation/Reference:

  A file can be viewed in two windows in a single vim screen by issuing Ctrl-w, s and Ctrl-w, v. The Keycombination

  Ctrl-w, s splits the vim screen horizontally. The key-combination Ctrl-w, v splits the screen vertically.

  Answer option C is incorrect. The Key-combination :wq is used to save a file and quit from the file in a vim text-editor.

  Answer option D is incorrect. The key combination :q! is used to quit from a file without saving its contents.

  What is vim?

  Vim is an advanced text editor that seeks to provide the power of the Unix editor vi with a more complete feature set. Vim is useful whether a user is already using vi or using a different editor. Vim is a highly configurable text editor built to

  enable efficient text editing. It is an improved version of the vi editor distributed with most Unix systems. It is perfect for all kinds of text editing, from composing email to editing configuration files.

• Question 25:

  You work as the Network Administrator for Tech perfect Inc. The company has a Linux- based network. You are a root user on the Red Hat operating system. You want to view all files created after the myfile.txt file. Which of the following commands should you use to accomplish the task?

  A. find -newer myfile.txt
  B. find -new myfile.txt
  C. find -recent myfile.txt
  D. find -not newer myfile.txt
  A. find -newer myfile.txt

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  Explanation/Reference:

  This command when used with the mtime option will list all files created after the myfile.txt file.

  The find command searches system for files that comply with certain numeric criteria such as, the date of the last change to the file's data (- mtime), the date of the last change metadata (-ctime) or the date of the last time the file was read (atime). There are also corresponding timestamp matching criteria that perform searches in times relative to the timestamps of other files

  using -anewer, -cnewer and -newer, which tests mtime.

• Question 26:

  Fill in the blank with the appropriate permission to complete the statement below.

  The___________command is used to start xsession using the xinit utility.

  startx

  Explanation/Reference:

  xinit is a program that allows a user to manually start an X server. The startx script is a front-end for xinit. By default, xinit and startx start an X server on display :0 and then start an xterm on it. When the xterm terminates, xinit and startx kill the X server. In general, xinit and startx can start an arbitrary server and run an arbitrary script. Typically, this script runs a number of programs and a window manager. Arguments immediately following the startx command are used to start a client in the same manner as xinit. For example the startx - -dpi 100 command starts the xsession with 100 dpi.

• Question 27:

  You work as a Network Administrator for McNeil Inc. The company has a Linux-based network. You are a root user on the Red Hat operating system. You want to know how many words are present in the file named file1.txt. You type the following command on the terminal: wc file1.txt.

  The command displays the following output:

  40 245 1800 file1.txt

  How many words are present in the file file1.txt?

  A. 40
  B. 285
  C. 245
  D. 1800
  C. 245

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  Explanation/Reference:

  From the above output, it is clear that 245 words are present in the file file.txt, as the second column represents the number of words present in a file.

• Question 28:

  You work as a Network Administrator for Perfect Solutions Inc. The company has a Linux- based network. Rick, a Sales Manager, has a permission issue on a file. You want to know the names of groups of which Rick is a member. You want to store the information in a text file named

  RickGroup.txt. Which of the following commands will you use to accomplish the task?

  A. ls rick /etc/group > RickGroup.txt
  B. ls /etc/group rick > RickGroup.txt
  C. grep /etc/group rick > RickGroup.txt
  D. grep rick /etc/group > RickGroup.txt
  D. grep rick /etc/group > RickGroup.txt

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  Explanation/Reference:

  The /etc/group file contains group information. This file shows which users are members of which groups.

• Question 29:

  John works as a Network Administrator for Perfect Solutions Inc. The company has a Debian Linuxbased network. He is working on the bash shell in which he creates a variable VAR1.

  After some calculations, he opens a new ksh shell. Now, he wants to set VAR1 as an environmental variable so that he can retrieve VAR1 into the ksh shell.

  Which of the following commands will John run to accomplish the task?

  A. touch VAR1
  B. env -u VAR1
  C. export VAR1
  D. echo $VAR1
  C. export VAR1

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  Explanation/Reference:

  Since John wants to use the variable VAR1 as an environmental variable, he will use the export command to accomplish the task.

• Question 30:

  Which of the following SHELL commands displays currently logged-in users and their tasks?

  A. w
  B. finger
  C. whoami
  D. who
  A. w

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  Explanation/Reference:

  The w command displays currently logged-in users and their tasks. Answer option C is incorrect. The whoami command displays the user name of the current user.

  Answer option D is incorrect. The who command displays currently logged-in users. It does not display their tasks.

  Answer option B is incorrect. The finger command displays information on system users.